Improvement in packing-rings for pistons of steam-engines



UNITED STATES PATENT OEEIcE. l

JOHN F. BOGARDUS, OF BROOKLYN, NEW YORK, ASSIGNOR TO HIMSELF,

JOS. ANDERSON, AND THOS. K. SOHERMERHORN, OF SAME PLAGE.

IMPROVEMENT IN PACKING-RINGS FOR PISTONS 0F STEAM-ENGINES.

Specification forming 'part of Letters Patent No. 57,037, dated August '7, 1866.

To all whom it may concern: l

Be it known that I, JOHN F. BOGARDUS, of Brooklyn, in the county of Kings and State of New York, have invented, made, and applied to use a certain new and usefulImprovement in Paekin gs for Pistons; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being' had to the annexed drawing, making part of this specification, wherein I have repsentated a side view of a piston and packingrings, with a portion of said rings removed to show them sectionally at one side of the piston.

The packing-rings of pistons are liable to become loose from kthe compression of the followers against the edges of said rings. The result is that the packing-rings do not commence to move at the same instant as the piston, and there is a concussion that tends to increase the space between the said ring and followers, allowing the steam to pass into the packing. l

My invention has for its object the preven- Ition of the said loose/ness in the packing-rings, so that they will remain tight, even when worn away considerably.

My said invention consists in an intermediate packing-ring with inclined edges, and not as thick as the ordinary packinglrings which there are on each side of it, so that said intermediate ring willnot be pressed out byl the action ofthe springs behind the pistonring, and will not wear away as rapidly as the other rings, and hence its inclined edges will cause the adjacent rings, as they expand as worn away, to press laterally against the piston-followers, and remain tight and in con` tact even when the rings are considerably worn away.

In therdrawing, a ct are the followers or anges of the piston, between which is the main ring b, with suitable springs behind it,

at c, as usual.j d d are the main packing-rings,`

and e is the intermediate ring, the face of which is wider than the back, so that its edges are inclined, and the edges of the rings d alA the rings d d, and'shonld be slightly contrae-- tile instead of expansive, so ,that its inclined edges tend to force the rings d d against the followers a, a,\an.d,in consequence of the back of the ring not coming into contact with the main ring b, there will be no friction or wear except thatresnlting from the contact of the rings cl d with its edges, and these, being inclined,press said rings d d apart, keeping them always in contact with the followers oriian ges a a, and hence always steam-tight. q

What I claim, and desire to secure by Letters Patent, is-

The arrangement of the packing-rings d d and e, with the edges that come in contact inclined, and the ring e, narrower at the back than on the face, and not so thick as the rings d d, so that thering b and springs c o shall only act to expand the ring e by the contact of the rings d with its inclined edges, for the purposes set forth. l

In witness whereof I have hereunto set my Vsignature this 2d day of April, A. I). 1866.

GEO. D. WALKER, GHAs. H. SMITH. 

